723121327

This number is a prime.

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Choose any digit d of this number; there is always a matching d spaced d digits apart from it (either to the left or the right), and none of these interceding digits are d. There is no smaller prime for which this is true. [Rivera]

Submitted: 2001-07-08 15:15:57;   Last Modified: 2009-02-18 22:18:26.
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